How to mount a Mac OS X 10.10 shared volume with Ubuntu Server 14.04

I'm attempting to mount a Mac OS X 10.10 shared volume via Ubuntu Server 14.04.1. I've set this up successfully between two Macs but I'm having a problem Ubuntu to Mac.

I've setup the shared volume "myStorage" via the Mac's Sharing System Preference panel. I've setup autofs file on the Ubuntu box as follows.

I've created a mount point:

sudo mkdir /mnt/server

File: /etc/auto.master

/mnt/server     /etc/auto.server        --timeout=6000  --ghost
+auto.master

File: /etc/auto.server

mymountpoint -fstype=cifs,credentials=/root/autofs.creds ://ip_address_here/myStorage -o iocharset=utf8,sec=ntlmssp,rw,nounix

File: /root/autofs.creds

username=MYDOMAIN\myusername
password=mypassword

I'm receiving these errors when trying to navigate to the mount point /mnt/server/myStorage. The mount point does show in the /mnt/server directory, but the result is:

-bash: cd: myStorage/: No such file or directory

in /var/log/syslog:

Status code returned 0xc000006d NT_STATUS_LOGON_FAILURE
CIFS VFS: Send error in SessSetup = -13
CIFS VFS: cifs_mount failed w/return code = -13

I've installed cifs-utils Any ideas on what I am doing incorrectly?